Mastitis - Breast Infection

A breast infection involves an infection of the breast tissue and/or the milk ducts of the breast.

What is going on in the body?

Breast infections are most common in women who are breast-feeding. Bacteria can get into the milk ducts through a crack in the nipple and cause an infection. Incomplete emptying of breast milk during feedings can contribute to the problem. Milk ducts can become blocked. A breast infection can also occur when bacteria enter the tissue through an opening on the skin.

What are the causes and risks of the infection?

Breast infections are caused when bacteria enter the milk-producing ducts or an open area on the breast. They are more likely when the flow of milk is blocked or restricted. Factors that increase a woman's risk for breast infection include the following: